Web UI: deleting the last track on the queue causes the next-last track to be played

Steps to reproduce

At https://open.audio/, add some tracks to the playing queue.
Click the "X of Y" button on the bottom-right to display the queue.
Scroll to the end of the queue, and click the "X" at the right end of the last track.

What happens?

The last track is deleted, and the second-last track starts playing.

What is expected?

The last track is deleted, but there is no change to what is currently playing.

Context

Funkwhale version(s) affected: 1.1.2+git.ea4be336 (https://open.audio/)

Firefox on DragonflyBSD current.